My toilet seat is broken and I'm not sure how to replace it.This house was redone 25 years ago and I've owned it for 13 years.The toilet has an unusual shape. Both the tank and the seat are lowand elongated. It is stamped " K of K Champlain" and dated 4-17-77.Where do I go and what do I do? Please hurry with the answer, mywife and children are running around in circles. Thanks.